The Teesside Gas Processing Plant consists of two gas processing trains with a combined capacity to process up to 675 million cubic feet of gas per day. The operational reliability since start-up has been in excess of 99.5% and the plant has an exemplary safety record.
 
Natural gas processed in TGPP originates from oil and gas fields in the North Sea. It is transported to the Teesside Gas Processing Plant via the Central Area Transmission System (CATS) pipeline and from mid 2013, gas will also be transported to TGPP via the Breagh pipeline.

Gas from the CATS pipeline that arrives on Teesside is called “wet” gas as it still contains Natural Gas Liquids (NGLs) as well as some water. This wet gas is unsuitable for use by consumers and requires processing before it can meet the specifications required for entry to the National Transmission System (NTS) or for sales to local industrial consumers on Teesside.

Initially, the wet gas undergoes a dehydration process to remove water present in the gas. Once the water is removed, the gas is chilled and the NGLs are removed leaving predominantly methane in the gas stream. This is then metered and exported as “dry” or sales quality gas.

The NGL undergoes further treatment through fractionation where the NGL is separated into three useful products; Propane, Butane and Condensate. The separate petroleum products are then transferred by pipeline either to liquid storage or to other petrochemical businesses based on Teesside for use as feedstock.